Classify the following expression by degree and term:

4x^2 + 3xy + 12yz

a. 2nd degree trinomial

b. 3rd degree polynomial

c. 12th degree trinomial

d. 2nd degree polynomial

The answer for this item is letter "A. 2nd degree trinomial" where the highest exponent of the variable is 2 thus, 2nd degree. Each of the second and third term is also in 2nd degree because the first degree variables are multiplied to each other. This is trinomial because the expression is composed of three terms

One unique triangle, because those angles add up to 180, and that's how many degrees there are in one triangle.